Greenhouse

greenhouse or conservatory A building or structure constructed chiefly of plastic, glass, glass-like or translucent material, cloth, or lath, which is devoted to the protection or cultivation of flowers, vegetables, ground covers, or other tender plants. In these structures where the climate is modified or completely controlled, the climate is improved for the growing of plants. They may have artificial means (natural gas heater or electrically powered humidifier, etc.) of controlling temperature, light, or humidity. They can also extend the growing season, winter over tender plants, start annuals early, raise vegetables and flowers out of season, or grow plants that could otherwise not be grown in the hardiness zone where the greenhouse is located.

green lumber Lumber with 20% or higher moisture content that should be dried (seasoned) on-site before use.

green manure Legumes (alfalfa, clover, cow peas, etc.) sown in fall and turned over in early spring to return humus and nitrogen to soil. It is referred to as green manure because the crop is turned under while still green.

green thumb Someone good with growing and caring for plants.

greenway A linear park, strip, or belt of vegetated open space land, or open space conservation area that provides passive recreational opportunities, pedestrian or bicycle paths, or the conservation of open spaces or natural areas. They are also often valued for aesthetic relief, buffering between land uses, or to provide a corridor for wildlife or people.

grinder pump A pump that is capable of solids-handling; designed for grinding sewage solids or such to produce slurry capable of pumping.

grip 1. A temporary ditch removing rainwater from a foundation while a structure is being constructed. 2. The length of a fastener or rivet measured within the materials it binds or fastens together.

groin 1. A wall or barrier built from the beach into the surf zone to slow or stop movement of sand. 2. The intersection and formation between two vaults.

groove A cut or indentation as a line across wood grain. When a similar cut is made parallel with the grain, it is a plow.

grooved joint A coupling device sometimes used to connect steel or iron pipes. It is comprised of a split, circular clamp with an elasto-meric gasket that fits around the joint and can be bolted tightly in place to prevent leakage.

gross acreage The total acres encompassed within a parcel of land. (Compare with net acreage.)

gross area or gross volume The area or volume in its entirety, without omitting any portions.

gross precipitation rate The total flow of water through a sprinkler station that does not account for the losses of water between the sprinkler nozzle and landscape. Or, the rate at which water is applied over an area of irrigation without considering losses that occur between the point of discharge and the ground (wind, fogging, blockage, evaporation, etc). It is expressed in an amount of depth per hour or minute. The most common use is gpm, and the factor for converting gpm per area to inches per hour is 96.3. The formula then for gross precipitation rate is the quantity flow in gpm multiplied by 96.3 and divided by the area.

gross section A term used for the area of a cross section through a structural member without deducting any holes in the area of the section. (Compare with net section).

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